Korean Institute of Surface Engineering

pISSN : 1225-8024 | eISSN : 3399-8403

공학

한국표면공학회지 (50권5호 322-331)

Synthesis and Characterization of Ni4Cr Nanofiber Electrocatalyst for Hydrogen Evolution Reaction

수소발생반응을 위한 Ni4Cr 나노 섬유 전기화학 촉매 합성 및 특성 분석

이정훈;장명제;박유세;최승목;김양도;이규환;
Lee, Jeong Hun;Jang, Myeong Je;Park, Yoo Sei;Choi, Sung Mook;Kim, Yang Do;Lee, Kyu Hwan;

한국기계연구원 부설 재료연구소 표면기술연구본부;한국과학기술연합대학원대학교 신소재공학부;부산대학교 재료공학과;
Surface Technology Department, Korea Institute of Materials Science;Department of Materials Science and Engineering, Pusan National University;

DOI : 10.5695/JKISE.2017.50.5.322

Abstract

Hydrogen evolution reaction(HER) was studied over $Ni_4Cr$ nanofibers(NFs) prepared by electrospinning method and oxidation/reduction heat treatment for alkaline water electrolysis. The physicochemical and electrochemical properties such as average diameter, lattice parameter, HER activity of synthesized $Ni_4Cr$ NFs could be modified by proper electrospinning process condition and reduction temperature. It was shown that $Ni_4Cr$ NFs had average diameter from 151 to 273 nm. Also, it exhibited the overpotential between 0.419 V and 0.526 V at $1mA/cm^2$ and Tafel slope of -334.75 mV to -444.55 mV per decade in 1 M KOH solution. These results indicate that $Ni_4Cr$ NFs with reduction heat treatment at $600^{circ}C$ show thinnest diameter and highest HER activity among the other catalysts.

Keywords

Hydrogen evolution reaction (HER);Alkaline water electrolysis;Electrospinning;NiCr nanofiber;